WSDL Documents
An WSDL document describes a web service. It specifies the location of the service, and the methods of the service, using these major elements:
Element Description
<types> Defines the (XML Schema) data types used by the web service
<message> Defines the data elements for each operation
<portType> Describes the operations that can be performed and the messages involved.
<binding> Defines the protocol and data format for each port type
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